Fix relative path resolution for models.yaml config

- Change working directory to PROJECT_ROOT on startup
- Resolve models_config path relative to PROJECT_ROOT
- Add debug logging for config path and available models
- This fixes "Unknown model" error when running from different directories

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

main.py

@@ -3,11 +3,18 @@
 
 import asyncio
 import logging
+import os
 import sys
 from pathlib import Path
 
+# Get project root directory
+PROJECT_ROOT = Path(__file__).parent.absolute()
+
+# Change to project root to ensure relative paths work
+os.chdir(PROJECT_ROOT)
+
 # Add project root to path
-sys.path.insert(0, str(Path(__file__).parent))
+sys.path.insert(0, str(PROJECT_ROOT))
 
 from config.settings import get_settings
 from src.core.gpu_manager import GPUMemoryManager
@@ -50,8 +57,13 @@ async def initialize_services():
 
     # Initialize model registry
     logger.info("Initializing model registry...")
+    config_path = Path(settings.models_config)
+    if not config_path.is_absolute():
+        config_path = PROJECT_ROOT / config_path
+    logger.info(f"Models config path: {config_path} (exists: {config_path.exists()})")
+
     model_registry = ModelRegistry(
-        config_path=settings.models_config,
+        config_path=config_path,
         gpu_manager=gpu_manager,
         max_cached_models=settings.max_loaded_models,
         idle_timeout_minutes=settings.idle_unload_minutes,
@@ -61,6 +73,12 @@ async def initialize_services():
     logger.info("Registering model adapters...")
     register_all_adapters(model_registry)
 
+    # Log available models for debugging
+    available_models = model_registry.list_models()
+    logger.info(f"Available models: {len(available_models)}")
+    for model in available_models[:5]:  # Log first 5
+        logger.info(f"  - {model['model_id']}/{model['variant']} (has_adapter: {model['has_adapter']})")
+
     # Initialize services
     logger.info("Initializing services...")
     generation_service = GenerationService(